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Laguna S 2.1 vs Nemotron 3 Ultra (550B A55B)

Laguna S 2.1 leads the LLM Stats Score 41.4 to 37.0.

Poolside · NVIDIA · Updated for 2026

Which is better?

Laguna S 2.1 leads the overall LLM Stats Score 41.4 to 37.0, ranking #43 overall.

In the 2 individual benchmarks reported for both models, Laguna S 2.1 wins 2; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Laguna S 2.1

  • overall performance matters — it scores 41.4 and ranks #43 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 2 of 2 exact shared results
  • you want the most recent training data — it shipped Jul 2026

Choose Nemotron 3 Ultra (550B A55B)

  • you are already invested in the NVIDIA ecosystem

At a glance

The differences that matter most.

Laguna S 2.1
Poolside
Nemotron 3 Ultra (550B A55B)
NVIDIA
Core performance indexes
LLM Stats Score
41.4
#43
37.0
#63
Reasoning
41.5
#40
36.3
#67
Coding
33.1
#37
22.1
#72
Agents
25.7
#43
13.4
#86
Cost, coverage & limits
Benchmark wins
2 of 2
0 of 2
Input price
$0.10 / M
— / M
Output price
$0.20 / M
— / M
Context window
1,048,576
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Laguna S 2.1
Nemotron 3 Ultra (550B A55B)
Tool use
18.9#56
7.4#132
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

6 reported for Laguna S 2.1 · 26 for Nemotron 3 Ultra (550B A55B)

2 shared

Laguna S 2.1 outperforms in 2 benchmarks (SWE-bench Multilingual, Terminal-Bench 2.1), while Nemotron 3 Ultra (550B A55B) is better at 0 benchmarks.

Laguna S 2.1 significantly outperforms across most benchmarks.

Fri Aug 28 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Model Size

Parameter count comparison

432.0B diff

Nemotron 3 Ultra (550B A55B) has 432.0B more parameters than Laguna S 2.1, making it 366.1% larger.

Poolside
Laguna S 2.1
118.0Bparameters
NVIDIA
Nemotron 3 Ultra (550B A55B)
550.0Bparameters
118.0B
Laguna S 2.1
550.0B
Nemotron 3 Ultra (550B A55B)

Context Window

Maximum input and output token capacity

Only Laguna S 2.1 specifies input context (1,048,576 tokens).

Poolside
Laguna S 2.1
Input1,048,576 tokens
Output- tokens
NVIDIA
Nemotron 3 Ultra (550B A55B)
Input- tokens
Output- tokens
Fri Aug 28 2026 • llm-stats.com

License

Usage and distribution terms

Both models are licensed under OpenMDW License v1.1.

Both models share the same licensing terms, providing consistent usage rights.

Laguna S 2.1

OpenMDW License v1.1

Open weights

Nemotron 3 Ultra (550B A55B)

OpenMDW License v1.1

Open weights

Release Timeline

When each model was launched

Laguna S 2.1 was released on 2026-07-21, while Nemotron 3 Ultra (550B A55B) was released on 2026-06-04.

Laguna S 2.1 is 2 months newer than Nemotron 3 Ultra (550B A55B).

Laguna S 2.1

Jul 21, 2026

1 months ago

1mo newer
Nemotron 3 Ultra (550B A55B)

Jun 4, 2026

2 months ago

Knowledge Cutoff

When training data ends

Nemotron 3 Ultra (550B A55B) has a documented knowledge cutoff of 2025-09-30, while Laguna S 2.1's cutoff date is not specified.

We can confirm Nemotron 3 Ultra (550B A55B)'s training data extends to 2025-09-30, but cannot make a direct comparison without Laguna S 2.1's cutoff date.

Laguna S 2.1

—

Nemotron 3 Ultra (550B A55B)

Sep 2025

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Laguna S 2.1 and Nemotron 3 Ultra (550B A55B) side-by-side, then vote on the output you prefer.

Laguna S 2.1
✓ Preferred
Nemotron 3 Ultra (550B A55B)
Open in Playground

FAQ

Common questions about Laguna S 2.1 vs Nemotron 3 Ultra (550B A55B).

Which is better, Laguna S 2.1 or Nemotron 3 Ultra (550B A55B)?

Laguna S 2.1 leads the LLM Stats Score 41.4 to 37.0. Laguna S 2.1 is made by Poolside and Nemotron 3 Ultra (550B A55B) is made by NVIDIA. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Laguna S 2.1 compare to Nemotron 3 Ultra (550B A55B) in benchmarks?

Laguna S 2.1 scores SWE-bench Multilingual: 78.5%, Terminal-Bench 2.1: 70.2%, SWE-Bench Pro: 59.4%, Toolathlon: 49.7%, SWE Atlas - Codebase QnA: 46.2%. Nemotron 3 Ultra (550B A55B) scores RULER: 94.7%, IMO-AnswerBench: 92.3%, PinchBench: 90.0%, LiveCodeBench v6: 89.0%, GPQA: 87.0%.

What are the context window sizes for Laguna S 2.1 and Nemotron 3 Ultra (550B A55B)?

Laguna S 2.1 supports 1.0M tokens and Nemotron 3 Ultra (550B A55B) supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Laguna S 2.1 and Nemotron 3 Ultra (550B A55B)?

Key differences include LLM Stats Score (41.4 vs 37.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Laguna S 2.1 and Nemotron 3 Ultra (550B A55B)?

Laguna S 2.1 is developed by Poolside and Nemotron 3 Ultra (550B A55B) is developed by NVIDIA.

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